One liter is the equivalent of approximately 0.2642 gallons. As both terms are measurements of volume, one can convert between the two by utilizing the fact that there are about 3.785 liters per gallon.

To convert liters to gallons, one can either divide the number of liters by 3.785 or multiply it by 0.2642. In order to convert from gallons to liters, one must do the opposite, either multiplying by 3.785 or dividing by 0.2642. Though not exact, these calculations result in a close approximation, especially when the volumes used are relatively small. On very large scales, however, it would be more accurate to use the United States' officially recognized conversion rate of exactly 3.785411784 liters per gallon. When referring to the Imperial Gallon, the conversion rate is 4.54609 liters per gallon.